Ruler



FIG. 1 is a front, left, top perspective new of a ruler, showing my new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side view thereof; and,

FIG. 5 is a bottom view thereof.

Broken lines are an indication of where the keypad and LCD would be located. Top view is a mirror image of bottom view. 

The ornamental design for a ruler, as shown and described. 